ANALYSIS OF BIOACTIVE CONSTITUENTS FROM A NEW STREPTOMYCES VARIABILIS STRAIN SU5 BY GAS CHROMATOGRAPHY - MASS SPECTROMETRY

Objectives: To analyze the bioactive constituents found in the crude extract of a new Streptomyces variabilis strain SU5 by gas chromatography - mass spectrometry. Methods: A total of fifty two actinomycetes were isolated from sediment samples of South east coast of Tamil Nadu by the serial dilution method. A new strain was identified based on cultural and molecular analysis as Streptomyces variabilis strain SU 5 and submitted in GENBANK with the accession number KF551876. The ethyl acetate extract of the new strain was produced by submerged fermentation and has been subjected to GC-MS analysis. Results: The major chemical constituents are Diisobutyl phthalate (31.84), Monoethylhexyl phthalate (20.33), tributylamine (13.24), Dibutyl phthalate (5.51), 2-Bromotetradecane (3.79) with the retention time 15.635, 21.606, 7.164, 16.608, 12.657 respectively. Conclusion: The presence of some of these constituents in the actinomycetes extract provides the scientific evidences for eliminating tumor cells in bone marrow, purging agent in autologous bone marrow transplantation, cytotoxic activity, stimulates adipogenesis and glyceroneogenesis, affects the differentiation of Human Liposarcoma

MORAXELLA OSLOENSIS MEDIATED SYNTHESIS OF TIO2 NANOPARTICLES

Objective: The main idea behind the present investigation is to explore the ability of Moraxella osloensis to reduce Titanium dioxide to nanosizes in a facile manner.Methods: The bacterium was grown in nutrient broth for 24 hr. The culture supernant was used for the bioreduction process. The synthesized nanoparticles were characterised by instrumental analyses namely FTIR, SEM and XRD. Toxicity of the nanoparticles was tested against HaCaT and Hep2 cell lines.Results: Moraxella osloensis with the dye degrading ability was found to be capable of reducing bulk Titanium dioxide to nanostructure. These biogenic TiO2 nanoparticles (TiO2 NPs) were in the size range of 60–150 nm with the average size of 72 nm. The particles were found to irregularly shaped and uniformly dispersed with less aggregation. In addition, XRD analysis indicated the presence of titanium beta. FTIR confirmed the involvement of proteins in the bioreduction and stabilization. Nano TiO2 was found to be more toxic against HaCaT and Hep2 cell lines than its bulk counterpart.Conclusion: Moraxella osloensis successfully synthesised TiO2 NPs in environmentally safe and cost effective method in an extracellular fashion.Keywords: Moraxella osloensis, Biogenesis, TiO2 NP, Characterization, Cytotoxicit

THREE-DIMENSIONAL QUANTITATIVE STRUCTURE–ACTIVITY RELATIONSHIPS MODELING STUDIES OF PHYTOCHEMICALS FROM BRASSICACEAE AS POTENT INHIBITORS AGAINST TUMOR INFLAMMATION

Objective: The aim of this study was to develop a three-dimensional quantitative structure–activity relationships (3D-QSARs) model for studying theinteraction of different phytochemicals with nuclear factor kappa B (NF-ĸB) inducing kinase, a major regulator in tumor inflammation.Methods: Different phytochemicals (ligands) from Brassicaceae were selected and tested for Lipinski's rule of five and further analyzed using interaction studies (docking) to identify the binding site in the target protein. Ligands with best fit were made to pass through ADMET filter, and the nontoxic ligands were selected based on the pIC50 values.Results: The 3D-QSARs of the ligands were designed using comparative molecular field analysis, and glucoraphanin was found to be stable and fit after subjecting for molecular dynamics simulation with annealing studies.Conclusion: Thus, the model may be prospectively used in drug design to find possible inhibitors of NF-ĸB, which plays a key prominent role in cancer inflammation.Keywords: Three-dimensional quantitative structure–activity relationships, Brassica oleracea, Simulation, Annealing, Nuclear factor kappa B kinase

DETECTION OF CANINE DISTEMPER VIRUS USING NESTED PCR

ABSTRACT Canine Distemper Virus is one of the most contagious RNA virus, which causes many fatal respiratory problems in dogs, seals, Red foxes, lions, badgers etc.,. Detection of CDV poses a very big and important task among veterinarians. This report mainly emphasis on the isolation and detection of the canine distemper virus in a novel way. Nasal and ocular samples from 25 dogs were collected from the clinical ward. Out of that, the first 5 were cultured in cell lines, namely MDCK and VERO. These cultured samples were passaged each for about 7 times which was sufficient enough for PCR detection. Field samples and cultured samples were then processed. The Viral RNA was extracted from cultured samples and the corresponding cDNAs were synthesized. Finally RT-PCR was done and it was followed by nested PCR. Out of the 25 field samples tested, 2 of them were detected positive and out of the 5 cultured samples, 3 were detected positive. Thus, the sensitivity of detection is shown to increase by about 40% when cultured, as the RNA content is prone to increase in cell culture.ergillus niger, Surface culture, Banana peel, Biomass, Fermentation

ICAM-1 molecular mechanism and genome wide SNP's association studies

Macrophages transformed foam cell formation occurs as a result of leukocyte accumulation mediated through intercellular adhesion molecule 1 (ICAM1), vascular cell adhesion molecule 1 (VCAM1), and E-selectin, secreted by inflamed or damaged endothelium. The key molecule is the ICAM-1, member of the adhesion immunoglobulin super family that maps to chromosome 19 p13.2-p13.3 codes for 505 amino acids have five extracellular domains including circulatory leukocytes binding site (primarily monocytes) for recruiting it at the sites of inflammation and the tight adhesion with vascular endothelium for the above mentioned pathogenesis as an initial step. Hence the objective of the current paper is to review the Genome Wide Association (GWA) studies and summarizes its understanding of functional Single Nucleotide Polymorphism (SNP's) of ICAM-1 clinical association to provide better guidance for the clinicians and researchers of the merits, demerits of the current results and direct them to do research on larger number of population for better prospective

The Synthesis, Characterization and Applications of Polyhydroxyalkanoates (PHAs) and PHA-Based Nanoparticles

Polyhydroxyalkanoates (PHAs) are storage granules found in bacteria that are essentially hydroxy fatty acid polyesters. PHA molecules appear in variety of structures, and amongst all types of PHAs, polyhydroxybutyrate (PHB) is used in versatile fields as it is a biodegradable, biocompatible, and ecologically safe thermoplastic. The unique physicochemical characteristics of these PHAs have made them applicable in nanotechnology, tissue engineering, and other biomedical applications. In this review, the optimization, extraction, and characterization of PHAs are described. Their production and application in nanotechnology are also portrayed in this review, and the precise and various production methods of PHA-based nanoparticles, such as emulsion solvent diffusion, nanoprecipitation, and dialysis are discussed. The characterization techniques such as UV-Vis, FTIR, SEM, Zeta Potential, and XRD are also elaborated